This is a note to let you know that I've just added the patch titled
drm/radeon: Ignore RADEON_GEM_GTT_WC on 32-bit x86
to the 3.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-radeon-ignore-radeon_gem_gtt_wc-on-32-bit-x86.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a08b588e4199e4200d26027ffcdf3ab2fa906412 Mon Sep 17 00:00:00 2001
From: Michel Dänzer <michel.daenzer@xxxxxxx>
Date: Thu, 27 Nov 2014 18:00:54 +0900
Subject: drm/radeon: Ignore RADEON_GEM_GTT_WC on 32-bit x86
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From: Michel Dänzer <michel.daenzer@xxxxxxx>
commit a08b588e4199e4200d26027ffcdf3ab2fa906412 upstream.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=84627
Signed-off-by: Michel Dänzer <michel.daenzer@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/radeon_object.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -187,6 +187,13 @@ int radeon_bo_create(struct radeon_devic
if (!(rdev->flags & RADEON_IS_PCIE))
bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
+#ifdef CONFIG_X86_32
+ /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
+ * See https://bugs.freedesktop.org/show_bug.cgi?id=84627
+ */
+ bo->flags &= ~RADEON_GEM_GTT_WC;
+#endif
+
radeon_ttm_placement_from_domain(bo, domain);
/* Kernel allocation are uninterruptible */
down_read(&rdev->pm.mclk_lock);
Patches currently in stable-queue which might be from michel.daenzer@xxxxxxx are
queue-3.17/drm-radeon-ignore-radeon_gem_gtt_wc-on-32-bit-x86.patch
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